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Note 5 - Long-term Debt - Summary of Long-term Debt (Details) (Parentheticals) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Nov. 03, 2018
Sep. 30, 2018
Dec. 31, 2017
Subordinated Debt [Member] | Subordinated Promissory Note 1 [Member]      
Interest rate   10.00% 10.00%
Subordinated Debt [Member] | Subordinated Promissory Note 2 [Member]      
Interest rate   10.00% 10.00%
Real Estate Loan 1 [Member]      
Interest rate   3.75% 3.75%
Peridoic payment   $ 5,255 $ 5,255
Real Estate Loan 1 [Member] | Scenario, Forecast [Member]      
Interest rate 5.75%    
Peridoic payment $ 2,875    
Note Payable To Seller Of Heat Waves [Member]      
Peridoic payment   $ 36,000 $ 36,000